Structure and Photoluminescence Characterization of LaPO4:Sm3+ Nanowires Prepared by Hydrothermal Method
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Abstract
LaPO4 nanowires doped with 1, 2,…8 mol% Sm3+ were prepared by a hydrothermal method. The samples were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), photoluminescence (PL), photoluminescence excitation (PLE), and absorption (ABS) spectroscopy. It was discovered that the PL and PLE of Sm3+ ions resulted from the radiative intra-configurational f-f transitions. The photoluminescence spectra shows 4 peaks at 560 nm, 596 nm, 642 nm and 701 nm which were assigned to different transitions from the 4G (4)5/2 excited state to the 6HJ with J = 5/2; 7/2; 9/2; 11/2 ground states of Sm3+ ion. The intensity of PL related to Sm3+ ion reached to a maximum when the Sm doping content was 2 mol%. Diffuse reflective spectra measured at room temperature of the Sm3+ doped LaPO4 exhibited absorption peaks at 343, 362, 374, 401, 415, 439, 460 and 477 nm which were observed in PLE spectra as well.
Keywords: Hydrothermal method, samarium doped lanthanum orthophosphate, nanowiresReferences
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